NEP160 User Manual
Copyright
–
2000 - 2011
Specifications subject to change without notice.
Page 18 of 24
F3 Mode
F3.1 To set Absolute Turbidity measurement mode.
1 Select the Mode menu by pressing
Menu
and then
F3
.
2 Select
F1
Abs NTU
3 Display will revert to normal, and all measurement will be in absolute NTU. This is confirmed by
ensuring the displayed measurements are
not
followed by the characters
REL
F3.2 To set Relative Turbidity measurement mode
1 Select the Mode menu by pressing
Menu
and then
F3
.
2 Select
F2
Rel NTU
3 Display will revert to normal, and all measurement will be in relative NTU. This is confirmed by
ensuring the displayed measurements are followed by the characters
REL
F3.3 To set up the Reference NTU value.
The reference NTU value is the reference point from which all Relative Turbidity measurements are made. If for example
the reference is set up as 100NTU, then the display will show
-
10NTU REL
in a 90NTU solution and
+10NTU
REL
in a 110NTU solution. The default value is 0NTU when supplied from the factory.
The Reference NTU value can be read at any time during measurement in the relative mode by pressing
F2
.
1 Select the Mode menu by pressing
Menu
and then
F3
.
2 Select
F4
SET Ref
If you know the NTU value you want set as a reference select
F1
Number
or
F2
Soln Ref
if you wish to use an actual solution as a reference.
3 If
F1
Number
is selected. Select the digit to be set using
F1
or
F2
, change the digit value by pressing
and
. Press and hold
and
to scroll rapidly to the desired value. Continue the above steps
with each digit until the desired Reference NTU value is displayed. Pressing
F2
after all digits have
been set, will scroll the cursor to the right and exit. This will store the reading as the Reference NTU
value.
If
F2
is selected, place the probe into the solution and allow the reading to stabilize. Pressing
F4
will
store the reading as the Reference NTU value. To cancel the operation, press
Menu
, the NEP160 will
quit and revert to normal display mode
4 The NEP160 will revert to normal display mode.
